Help with cosplay costume? (Riza Hawkeye)?

Hi! I'm making plans to get a Riza Hawkeye cosplay costume! I've already found the main uniform I'm going to buy, (because I do not have the skills to make one ><) but it's missing some of what I believe are key parts. For example the gun, when does Riza NOT have a gun. I've been told to get an airsoft gun, but as of yet finding one similar to hers and affordable has been difficult for me with other stuff going on. Another is the holster. I've looked for that too and cant buy one so I'm going to try my hand at making it (O.O) if I can find directions or at least a good guideline. (the one she wears with her military outfit not her casual holster). The last thing I want to find... is a stuffed dog like black hayate. ^^ Because he's so dang adorable. Thanks for everything!! ((I'm in no rush for an answer I have... until next spring to get everything! lol )) Links to any to where you find any of the above are the best! And sorry if this is in the wrong section I was a little lost as to where it would fit ><.